1031 Identification Rules: The 3-Property, 200% and 95% Rules

The 45-day identification window is the part of a 1031 exchange where good intentions most often turn into taxable mistakes. The IRS limits how many replacement properties you can name and how much they can be worth, through three rules, and it requires the identification to be made a particular way. None of this is difficult, but all of it is unforgiving: an identification that breaks a rule or is made improperly can invalidate the exchange even if every other step is flawless. This memo covers each rule, how to put a valid identification on paper, and how to think strategically about what to name.

Why the identification rules exist

The identification rules balance two competing needs. On one hand, you need flexibility — the ability to name backups in case your primary deal falls through, since you can't add properties after Day 45. On the other, the IRS doesn't want you identifying an unlimited list of every property in the market just to keep your options open indefinitely.

The three rules resolve that tension by capping either the number of properties or their total value, with one narrow exception for investors who genuinely intend to acquire nearly everything they identify. Together they give you room to plan for contingencies without turning the identification into a meaningless formality. Which one you rely on determines how many properties you can name and how much total value you can identify — decisions you must make before you draft your Day-45 identification, because getting them wrong invalidates it.

The three identification rules at a glance

Within your 45 days, you may identify replacement property under any one of three rules. You only have to satisfy one of them:

Rule	What it allows
Three-property rule	Identify up to three properties of any total value, and acquire any one or more.
200% rule	Identify any number of properties, provided their combined value is no more than 200% of what you sold.
95% rule	Identify beyond those limits only if you actually acquire at least 95% of the total value identified.

These rules sit inside the broader 45-day clock covered in our timeline memo.

The reason there are three rules rather than one is that investors have different needs. Some want a primary target and a couple of backups; some want to assemble a diversified portfolio of many properties; and the rules accommodate both, while the 95% rule exists as a strict backstop for anyone who oversteps the first two.

The three-property rule

The simplest and by far the most-used option lets you identify up to three replacement properties, regardless of their value, and then acquire any one, two, or all three. Its appeal is that it requires no arithmetic — three properties, any prices, done. Most investors use it precisely because it allows a primary target plus one or two backups without any value ceiling to track. Remember that identifying three doesn't obligate you to buy three; it simply preserves options, and naming a backup or two is prudent insurance against a primary deal falling through.

The 200% rule

When three isn't enough — typically because you're spreading proceeds across several smaller properties or building a diversified portfolio — the 200% rule lets you identify any number of properties, as long as their combined fair market value does not exceed 200% of the value of what you sold. Sell a $1,000,000 property and you may identify any number of replacements totaling up to $2,000,000. The discipline this rule demands is watching the aggregate: it's easy to add "just one more" candidate and quietly breach the 200% ceiling, which throws you out of the rule entirely unless you can satisfy the 95% rule instead.

The 95% rule

The 95% rule is an escape valve, not a strategy. If you identify more than three properties and their combined value exceeds 200% of what you sold, your identification is still valid only if you actually acquire at least 95% of the total value you identified. In practice this is hard to rely on: it requires you to close on nearly everything you named, leaving little room for a deal to fall through. Sophisticated investors treat it as a backstop that occasionally saves an over-broad identification, not as a deliberate plan. If you find yourself counting on the 95% rule, it usually means the identification should have been structured differently.

Choosing the right rule

Most exchangers use the three-property rule. It covers the common case — replacing one property with one, plus a backup or two — without the burden of tracking total value, and it's value-blind, so a high-value backup is no problem. Diversifiers buying several DSTs or smaller assets lean on the 200% rule, which lets them name more than three targets as long as the total stays within twice the relinquished value. The 95% exception is a last resort for those acquiring nearly everything they identify.

Decide which rule you're using before you draft your identification, and let it govern both the number of properties and the total value you name. Your qualified intermediary can confirm you're within the chosen rule before you deliver the notice.

Worked examples of each rule

Say you sell for $1,000,000. Under the three-property rule, you could identify three properties worth $500,000, $900,000, and $1,200,000 — any total value is fine — and acquire whichever you choose. A primary at $1,000,000 plus two smaller backups is a typical setup.

Under the 200% rule, you could identify five DSTs totaling up to $2,000,000 (200% of your $1,000,000 sale), then acquire the ones that build your target portfolio. Identify six worth $2,200,000 combined, though, and you've blown the cap. Under the 95% exception, you could identify ten properties worth $3,000,000 total, but you'd have to close on at least $2,850,000 of that value — leaving essentially no room for any deal to fail. These figures are illustrative; the rules, not the numbers, are the point.

How value is counted under the 200% rule

Under the 200% rule, value is measured by the fair-market value of each identified property, summed across your entire list, compared with 200% of the relinquished property's value. It's the gross value of the properties, not your equity in them, that counts toward the cap.

This matters when leverage is involved. A $2,000,000 property you'd buy with $1,000,000 of debt still counts as $2,000,000 toward the cap, not $1,000,000. Build your list with the full values in mind so you don't inadvertently exceed 200%. Keep a running tally as you add candidates, and have your qualified intermediary verify the total before you deliver — a clean count is the difference between a valid 200%-rule identification and a failed one.

A diversified 200%-rule example

To see the 200% rule in action, imagine you sell a commercial building for $2,000,000 and want to diversify the proceeds rather than buy a single replacement. Under the 200% rule, you can identify properties totaling up to $4,000,000 in fair-market value — plenty of room to build a portfolio.

You identify five DSTs: a $1,200,000 multifamily DST, a $900,000 net-lease DST, an $800,000 industrial DST, a $600,000 medical-office DST, and a $500,000 royalty DST — $4,000,000 combined, right at the cap. Each is a defined offering with a defined value, so counting toward the 200% limit is straightforward. You then acquire the four that best fit your target allocation, investing precisely enough to meet equal-or-greater value and replace your debt through the leveraged DSTs. The result is a single exchange diversified across five sectors, multiple sponsors, and many geographies — far more resilient than rolling $2,000,000 into one building.

Notice the discipline required: you tracked the running total of fair-market values as you built the list, kept it within $4,000,000, and confirmed the count and values with your qualified intermediary before delivering. Identify a sixth DST that pushes the total to $4,300,000, and you'd have blown the cap — failing the identification unless you could acquire 95% of the entire $4.3 million. The 200% rule rewards careful value tracking, which is exactly where a disciplined process pays off.

How to write a valid identification

Satisfying a rule isn't enough; the identification itself must be done correctly, or it fails on form:

• In writing and signed by you, the taxpayer.
• Delivered by midnight on Day 45 to your qualified intermediary or another party to the exchange — not to your own agent, attorney, or a relative, who don't count for this purpose.
• Unambiguous. Each property must be described clearly enough that there's no doubt what was identified — typically a street address or legal description, not "a property in Dallas."

One useful nuance is the incidental property rule: property that is incidental to a larger property and worth no more than 15% of that property's value — appliances, furnishings, or equipment that come with a building, for example — generally does not have to be separately identified. It travels with the main asset. That keeps you from having to itemize every refrigerator in an apartment building you've named.

Revoking and changing an identification

You are not locked into your first draft. You can revoke and re-identify as many times as you like, in writing, up until the 45-day deadline. After midnight on Day 45, however, the identification freezes — whatever stands at that moment is what you must work with for the remainder of the exchange. The practical advice is to treat the deadline as real and finalize a day or two early rather than amending at the last minute, when a delivery failure or a misdescription has no time left to be corrected.

Strategy: how many properties to identify

The rules are mechanical; the judgment is in how you use them. For most investors buying a single replacement, the three-property rule with a primary target and one or two genuine backups is the sensible default — it costs nothing to name backups and they can rescue an exchange if the primary deal collapses. A fast-closing Delaware Statutory Trust is a popular backup precisely because it can settle in days. Investors assembling a portfolio lean on the 200% rule but must police the aggregate-value ceiling. And nearly everyone should avoid relying on the 95% rule, which leaves no margin for a deal to fail. The overarching principle: identify with the same care you'd close with, because a sloppy identification can undo an otherwise perfect exchange.

Common identification mistakes

Identification failures are almost always procedural, and almost always avoidable. The recurring ones:

• Vague descriptions. "A retail center in Phoenix" isn't an identification; a street address or legal description is. Ambiguity can void the designation.
• Delivering to the wrong party. The notice must reach your qualified intermediary or another party to the exchange — not your own real estate agent, attorney, or a relative, none of whom count.
• Oral or informal identification. It must be in writing and signed. A phone call, a text, or an unsigned email won't do.
• Breaching the 200% ceiling. Adding "just one more" candidate can tip you over the limit and out of the rule unless you can meet the 95% test.
• Relying on the 95% rule. Counting on acquiring 95% of everything identified leaves no room for a deal to fall through.
• Waiting until Day 45. A last-minute delivery that fails has no time left to fix. Finalize early.

Every one of these is a self-inflicted wound. The defense is a written, signed, unambiguous notice delivered to the right party with days to spare.

Identifying DSTs and fractional interests

Replacement property doesn't have to be a whole building. A fractional interest — a Delaware Statutory Trust interest or a tenant-in-common interest — can be identified and acquired like any other replacement, which is what makes these vehicles such useful backups within the 45-day window. The key is description: you identify a fractional interest by naming the specific offering or trust and the percentage or beneficial interest you intend to acquire, clearly enough to remove ambiguity, rather than by a street address alone.

Because a DST can absorb a precise dollar amount and close in days, many investors name one among their three identified properties specifically as insurance: if a primary deal collapses late in the window, the DST is already identified and can be completed inside the remaining time. It's the cleanest way to keep the 45-day decision from becoming a single point of failure.

How advisors use the rules in practice

Experienced advisors treat the identification rules as a risk-management toolkit, not just a compliance hurdle. For a typical exchanger replacing one property, they'll structure a three-property-rule identification with a strong primary and one or two fast-closing backups — almost always including a DST that can close in days if the primary fails.

For an investor deliberately diversifying, they'll build a 200%-rule list of several DSTs across sectors, sized so the combined value stays within the cap and so the eventual acquisitions hit the equal-or-greater-value and debt-replacement targets precisely. The goal is always the same: maximize the chance of completing a fully deferred exchange while keeping options open. The 95% exception rarely enters the picture except for large, near-certain portfolio acquisitions, where the buyer is confident of closing essentially everything identified.

The throughline is preparation. An advisor helps you assemble and vet a shortlist before you sell, choose the rule that fits your strategy, draft a clean identification, and confirm it complies before Day 45. Done well, identification becomes a confident, deliberate step rather than a last-minute scramble — and that confidence is what separates completed exchanges from failed ones.

Identification in special situations

The identification rules apply the same way in special situations, but those situations add wrinkles worth planning for. When you sell multiple relinquished properties as part of one exchange, the 200% cap is measured against the combined value of everything you sold — which gives you more room to identify a diversified set of replacements, but also more total value to track carefully.

When the exchanging taxpayer is a partnership or LLC, the entity identifies and acquires as a single taxpayer; individual partners can't identify separate properties for their own accounts inside the same exchange. Partners who want different replacements generally need to plan a drop-and-swap well in advance, which affects who identifies what. For large portfolio acquisitions, the 95% exception occasionally becomes practical, because a buyer acquiring a pre-arranged portfolio may be confident of closing essentially everything identified.

In a construction or improvement exchange, you identify the replacement property and describe the improvements to be made, in enough detail to identify the completed property — and remember that only improvements finished and paid for within 180 days count toward your replacement value. Related-party exchanges layer on a two-year holding requirement that doesn't change identification itself but does shape which properties you'd want to identify. Across all of these, the discipline is the same: choose the rule that fits your list, track the count and total value against its limits, describe each property unambiguously, and confirm compliance with your qualified intermediary before Day 45. The more complex the situation, the more valuable it is to involve an experienced advisor and your CPA early.

The rules in practice

In day-to-day practice, the overwhelming majority of exchanges use the three-property rule with a primary and one or two backups, one of which is often a DST. It's simple, flexible, and value-blind, and it covers the typical replacement scenario cleanly.

The 200% rule comes into play when an investor is deliberately diversifying a single exchange across multiple assets — most commonly a set of DSTs spanning sectors and sponsors. The 95% exception remains rare, reserved for large, near-certain portfolio acquisitions. Whatever rule fits your situation, decide on it early, build your list against its limits, and have your qualified intermediary confirm compliance before Day 45.

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